The halves of two bodies, one belonging to a female Swedish politician, are discovered in the middle of the Øresund Bridge, which connects Copenhagen in Denmark with Malmö in Sweden. The body, cut in half at the waist, has been placed precisely on the border between the countries, thus falling under the jurisdiction of both the Danish and Swedish police agencies. After further examination, it turns out that the body is that of two separate corpses, with one half belonging to a Danish prostitute. Saga Norén, from the Swedish side, and Martin Rohde, from the Danish, lead the investigation to catch the murderer.